Phone: (519) 746-4761

Canadian Address:

169 Lexington Court, Unit I

Waterloo, ON, N2J 4R9


US Address:

Niagara Falls, NY 14305

Canadian/International ship from Waterloo; US orders from Buffalo, NY.

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Assembled Alpha Helix Model

The Indigo alpha helix model is designed to work with the Indigo 17 base pair DNA model & 36 base pair DNA model is only available assembled.  

SKU: 62121A
Indigo Alpha Helix Molecular Model-Assembled


Quantity :

The size of the major & minor groove in the B DNA helix is very specific since most of the important chemistry takes place there. This model has been designed to fit the major groove by taking into account the stearic hindrance that is imposed on the molecule by the atoms in the DNA model. While you can physically squeeze it into the minor groove of our DNA model this would be forbidden in the real thing.

Note that poorly designed copies of our DNA model have a major groove that is more than double the correct size & have correspondingly much smaller minor grooves.

The animation below from Scientific American is particularly well done. However, it doesn't mention the fact that alpha helixes are attached in the major groove as anchors & are used in the process of pulling replicating DNA strands apart.

60010EHydrogen cap, ("mushroom"), ~15mm88
60200EAtom, Molymod, red (oxygen), 2 hole, 105 degrees1
60210EAtom, Molymod, white (hydrogen), 2 hole, 180 degree, 17mm15
60211EAtom, Molymod, red (oxygen), 2 hole, 180 degrees, 17mm18
60320EAtom, Molymod, black (carbon), 23mm trigonal keylock18
60321EAtom, Molymod, blue (nitrogen), 23mm trigonal keylock18
60400EAtom, Molymod, black (carbon), 4 hole, 109.5 degrees, 23mm40
61015EBond, Molymod, opaque, 2mm (for spacefilling models)110
61025EBond, Molymod, red keylock, 1mm18
60401EAtom, Molymod, blue (nitrogen), 4 hole, 109.5 deg., 23mm1
60311EAtom, Molymod, blue (nitrogen), 3 hole, 120 degrees, 23mm1

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